DE2145633A1 - Floor care machine - Google Patents

Description

2U5633

TEHlTMT COMPANY

701 Forth Lilac Drive

Minneapolis, Minnesota, USA September 11th, 1971

Floor care home

The invention relates to a floor care machine that is used as a sweeper but is usually used as a scrubbing machine. In particular, the invention relates a self-propelled floor care machine with two interacting, counter-rotating maintenance tools that guide material from the surface to be cleaned into a container, and with a deflector for deflecting at least part of the material lifted from the surface by the tools into the container.

There are many different types of powered Sohrubbing machines have been propagated in the prior art and some of them employ a double brush scrub system. An example of a well-known Machine with a hand-operated double brush unit is known from US Pat. No. 3,061,859, while from U.S. Patent 1,694,957 © in © another type of hand-operated Floor scrubbing machine is known that works with two scrubbing brushes. Counter-rotating double brushes are used in Street sweeping machines are used, see for example U.S. Patent 570,850. U.S. Patent 2,685,885 eats a Floor cleaning machine with two brushes known that with one The operating seat is equipped to take up liquids or other soil wastes, but not

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with a scrubbing brush. Another floor cleaning machine is known from US Pat. No. 1,938,068, the double brushes has, but the brushes are separated from one another by an axially extending guide piece, which limits their efficiency.

Many of these known gate directions are difficult to manufacture and to use · sample web it is difficult to find the gate directions to steer or maneuver, and if the squeezing device or drying device is rotated, streaks or puddles are often left behind. These known gate directions are not quick and easy to move, and they do not properly pick up dirt and debris. This means that the floor is usually used in the known machines Must be swept before scrubbing. Furthermore, the scrubbing is incomplete, the reuse of the sohrubbing liquid moderate and limited ability to get up close to walls.

The invention provides a self-propelled scrubbing machine that increases the speed of operation, Saves on scrubbing fluid and does not require sweeping the floor before scrubbing because it has the ability to remove dirt and Pick up waste. The drive and steering wheels of the machine are located on a drive unit of the device and a double-brush wet scrubber forms a separate unit (Trailer. The two units are through a coupling connected to each other to raise and lower the unit carrying the scrubbing brushes of the drive unit to enable. A controlled floating effect on the scrubbing unit is provided to reduce the downward pressure on the Determine scrubbing brushes.

The overall device is designed so that the used Components are arranged in a balanced way, and the double brushes used with the scrubbing unit sit in the right place and have a corresponding fora and size and are used with

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driven at the appropriate speed, including both picking up dirt and waste and scrubbing. The Sohrubbing Unit can therefore be used as a dry sweeper. The water or scrubbing fluid is reused by using it is passed over the front of the brushes, and any excess water or scrubbing fluid that or that of the rear Brush is carried along, is pressed and sucked into a tank, A dirt container is provided to remove dirt and water or Pick up scrubbing fluid that is picked up by the scrubbing brushes. The dirt container can in front sit next to the double brushes or behind the double brushes, whichever is preferred.

The two brushes are arranged so that they are close to the side edges scrub the machine, and the brushes are designed so that they can be removed for servicing by remove a holder at one end of the brushes and pull them in that direction. Furthermore, the brushes can the same size or a different size to achieve the desired level of scrubbing.

The frame for the trailer has a divider and a guide between the brushes so that the scrubbing fluid is returned and is reused and dirt and waste is directed into the dirt bin.

Other features include, if required, small turning devices for the drive unit and a sensing device for the automatic partial relief of the brushes when the force required to drive the brushes increases, in order for a to provide automatic compensation so that the motor used with the unit is not overloaded.

Optionally, the trailer can be arranged to move sideways so that sharper bends can be made, when the unit is on the wall, with an arrangement

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the hydraulic tank, which is provided for the supply of liquid to the liquid-operated individual parts of the drive, is provided at the front end of the drive unit to create a counterweight to the trailer.

A feature of the invention is that the drive unit runs on a surface that has not yet been moistened by the scrubber has been. In cases where the entire surface has been flooded or made wet by external sources before scrubbing, the device may include means to direct a jet of drying air to the wet surface immediately in front of the drive and Steering wheels to direct.

The side squeezing devices used are mounted with leaf springs to allow them to float and still allow them to escape to prevent wash water and dirt, even when turning. The leaf springs take care of the side squeezing devices also for an automatic readjustment as compensation for wear of the cylindrical brushes so that they do not have to be readjusted or readjusted by hand. The rear The squeezing device cooperates with the horizontal squeezing devices in order to prevent streaking when turning. A Hydraulic cylinder determines the movement of the rear squeezing device up and down so that it can be lifted if that is to be done to avoid damage, or can be pressed down with the desired force.

The Ilaschine invention schofit a versatile scrubber that has a long life, a good ^T .. 'iederverwendung the Schrubbflüssigkeit shows that receives Gehmutz and waste with the scrubbing, is in the running speed variable, has the ability to lift the scrubbing unit and lower slightly is to be steered and operated and provides the features that have been indicated above and will be specified in the following description.

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You invention lit in the following with reference to τοη exemplary embodiments explained in more detail with reference to the drawings. In the drawings are »

Fig. 1 is a side view of a Sohrubbmasohine,

Pig. 2 shows a side view of the machine shown in FIG details shown in section and in section,

5 shows a detail in plan view of a scrubbing unit with a view on the plane of the line 5-5 in FIG. 2,

FIG. 4 is a soak picture showing how a Sohmutz container is removed from the Sohrubbing,

Fig. 5 shows a detail in section on the line 5-5 4er Fig. 5,

Fig. 6 is a side view of the Sohrubbeinheit with partially sectioned details, with the operating elements for a rear pinch device partially in schematic view Depiction,

Fig. 7 is a detail in side view showing a side squeeze device with the leaf spring mounting thereof;

Fig. 8 is a detail in section on the line 8-8 of Fig. 7t

9 shows a schematic representation of the hydraulic system for the machine,

10 shows a schematic representation of a variant of the drive system to support the making of smaller bends,

11 is a partially schematic side view of the trailer, with a controller for reducing the downward pressure on the scrub brushes in response the torque required to drive the brushes is shown,

Fig. 12 is a detail in section showing a container emptying mechanism according to the invention;

Fig. 15 is a plan view of the mechanism shown in Fig. 12;

14 is a side view of a manual actuator for the container emptying mechanism,

Fig. 15 is a plan view of the actuator shown in Fig. 14, Fig. 16 is a so-like plan view of a modified embodiment

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management example showing a transverse trailer scrubbing unit, which allows for sharper bends when the scrubber is close to a Vand is located

Tig. 17 a detail with a view from the plane of the line 17-17 of Fig. 16,

Fig. 18 is a side view of a scrubber variant with a

Establishment bum drying a flea that is ror de »scrubbing wet,

flg. 19 a detail of a Selektorrentil »which is used, if exhaust gases are used for the drying air jet,

FIG. 20 is a view looking from the plane of line 20-20 in FIG Fig. 18,

21 is a side view of a sohrubbing unit in a modification, in which the main dirt container door the brushes is arranged, with a container that sits further back is tilted, and

Figure 22 is a side view of a scrubbing unit with different sized brushes used for scrubbing.

A floor cleaning machine 10 consists of a drive and Steering unit 11 and a scrubbing unit 12, which are built independently and connected to one another, in such a way that the drive unit 11, as shown, the scrubbing unit 12 looks across the surface to be scrubbed, specifically via a coupling I5. The drive unit comprises a main frame 14 or a main frame, furthermore driven baths 15 at the rear end and a front steering wheel 16 (see Fig. 10). The drive wheels 15 are each driven by separate hydraulic motors 17 and 18 which are driven in a suitable manner via a pump 29 of variable volume as desired. The hydraulic motors are speed controllable, and a foot pedal 21 is used to determine the speed of the vehicle by adjusting the variable tolumen pump accordingly.

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The drive unit can be equipped with brakes that are operated by can be operated by an operator via a pedal 22, which sits on an operator seat 23. The hydraulic motors can be mounted independently on the frame of the drive unit, and then the drive wheels 15 are drivable on the respective Supported drive shafts of the drive motors. Any other suitable arrangement can be used to propel the vehicle in a known manner be used.

The steering wheel 16 is around an upright axis with a suitable one Frame 24 is supported and it is controlled by the steering wheel 25 About a tow coupling 26 and a control arm 27 steered from. A steering gear, as it is known from the automotive industry, is used at the bottom of the steering column.

The drive unit is driven by an air-cooled motor 30, which sits at the front end of the drive unit 11 is mounted on the frame 14 (see Fig. 9) · The air-cooled Ilotor is used as shown for the individual drive parts, for example for a main drive pump 29 variable Volume (which is only shown schematically) and for a hydraulic pump 31 for accessories, with a drive via a Belt assembly 32 takes place from the output shaft of the engine. The pump 31 is used to drive the hydraulically driven components the machine used. ¥ ie can be seen, there is a main hydraulic tank 33 on the front part of the frame 14

The frame for the drive unit also carries a tank 34 for clean scrubbing fluid on which the operator seat 23 sits and as can be seen the fluid tank is on the frame hinged so that it can be tilted backwards, as shown in phantom in Fig. 2, to provide access to components to allow that sit under the liquid tank. The battery, filter and other components can be stored under the Be housed liquid tank. This liquid tank if the u is used, water or some other scrubbing liquid

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ability, "for example a detergent solution or a solvent solution, to lead to surface 35 over which the vehicle drives and is scrubbed. According to the illustration in FIG. 2, a hose 36 ′ extends from this liquid tank down to a transverse distributor pipe 37 for the scrubbing liquid, which extends across the width of the machine and is slightly above the floor and a leakage of the scrubbing liquid according to the bar position at 38 on the floor and a Moistening the floor in front of the scrubbing unit 12 allows. The pipe 37 can of course be any suitable type of feed pipe, which is known per se. The pipe 37 forms a liquid distribution manifold. The tube 36 has a manually operated on-off valve for determining the liquid flow.

The scrubbing unit 12 has a frame as shown. This frame 41 surrounds the scrubbing unit. The frame 4I, in turn, is reinforced with a cover frame plate 42 connected thereto. A transverse, substantially V-shaped support and divider piece 43 (Fig. 6) is attached hanging down on the plate 42 such that its apex is remote therefrom. The piece 45 reinforces the plate 42 and performs the function described below. The frame 4I has, as shown, a removable strut 44 on one side, which removably connects front and rear transverse pieces, and this strut can be removed (see Fig. 3 ¹¹ ^ d 6) to install and remove two scrubbing brushes 45 and 46 to enable. The front brush 45 is driven to rotate in the direction of arrow 47 and the rear scrub brush 46 is driven in the direction of arrow 48. The brushes are selected so that they have good dirt pick-up properties. The rows of bristles are arranged at a distance to give the brushes the opportunity to "run over" dirt. The brushes are not full bristle brushes. Furthermore, the bristles are preferably arranged in a herringbone shape.

The drive motors for the brushes are located in the end of the brushes opposite the removable strut.

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2U5633

These motors are hydraulic motors 51 b »w. 52 with fixed displacement. The hydraulic motors are attached to the side of the frame 41 by means of brackets 53, and they extend inward so that the drive shafts of the respective motor, for example the drive shaft 52A of the Motor 52, is coaxial with the axis of rotation of the respective brush. As shown, the brushes are provided with an open tubular core 51B and 52B and the bristles extend outward. The Haydaulik motors fit into the respective tubular centerpiece. The shafts for the hydraulic motors have suitable connections for connection with suitable spacers 56 in the respective brush. The drive connections from the hydraulic motors go through the intermediate pieces to the interior of the tubular Xernstüoks 51B baw. 52B. The brushes are respectively driven by their respective motor shafts 52A and 51A, respectively, and they are also driven by these shafts.

The opposite ends of the brushes are each in bearing parts 55 mounted, the bind attached to the strut 44, with two shafts 57 and 58 fixedly mounted there according to the illustration are. The waves can possibly be welded to the strut. These shafts 57 and 58 in turn carry more suitable Wise arranged bearings, which are only guide bearings, and brush spacers 59 and 60 are seated on the bearings in such a way that these spacers rotate freely with respect to the said Uellen. The spacers fit into the tubular core pieces for the brushes, and they in turn have flanges attached to the end faces of the tubular core pieces for the respective brush 45 or 46 are applied. The intermediate pieces fit tightly into the inneron cores. So if the bracing 4Ί on flor provided flt ^ lle is robbed of angosa, the Frame 4I held together, and the spacers 59 and 60 fit in the- üiiraten, in order not to be in the right position in the framework. genübor and don to keep drive motors opposite. The brushes rotate in a driven manner when the corresponding hy-

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hydraulic motors 51 and 52 are running. The brushes 45 and 46 can be driven at the same or at different speeds. The brush that runs faster is the one that sits on the container 65 when working at different speeds. Different speeds of the brush, the storage of dirt and waste (reciprocal function) as well as the liquid saufnahiie support · Al · a case of "pi el for a preferred operation of brushing run with a Außendurohmesser tone α" at a speed of 450 to 550 UpH, wherein both brushes run at the same speed.

Sine! For 61 is intended to cover the opening of the housing of the unit 12 through which the brushes are removed and serviced . A suitable hinge 62 is provided for this door.

The divider guide piece 43 is a transverse part, as shown, and it sits over the two brushes 45 and 46

As shown in FIGS. 4 and 5, there is a dirt container 65 removable on heels 4IA formed by the frame 4I, and it has a lip area 67 »which sits close to the bristles of the rear brush 46. The lip area also lies essentially along or slightly below a horizontal plane which passes through the axis of rotation of the brush 46. The frame plate 42 ends according to FIG the illustration along a rear hand, which lies over the dirt container, so that any liquid that is from the Brushes are thrown up and carried along the underside of the plate, falls into the dirt container.

The dirt bin has two handles 68 which can be used to manually pull the bin off the frame for emptying to be taken out when the container is full of dirt and trash int.

Located at the rear of the frame I4 inside the frame

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2U5633

There is a rear squeezing device 7O ₁ which can be actuated in the upward and downward direction by a hydraulic cylinder 71 (FIG. 6), whereby the hydraulic cylinder is controlled by a valve 71A of suitable construction, which will be described in connection with FIG. 9 . This squeezing device 70 is seated on pivoting parallel arms 72 at opposite ends of the same, so that when the unit is raised and lowered with the aid of the hydraulic cylinder 71, it is raised in parallel. With the wear and tear and lowering, the squeezing device also moves straight down against the floor, i.e. does not stand at an angle to it. The squeezing device has an upper frame 73 'which includes upright files 73A to which the arms 72 are hinged. The opposite ends of the arms 7 ² are hinged to the frame / | 1.

The hydraulic cylinder 71 can be used for a downward force on the squeezing device, and if the downward force is overcome (a Safety valve in valve 71a is used to reduce this force used), the squeezing device moves upwards, guided by the parallel arms 72, against the downward one Force of the safety valve.

The upper frame 73 of the rear squeezing device has resilient, downwardly extending, longitudinally spaced aprons 74 which are attached to the frame 73 (Fig. 5) The aprons can be made of a suitable elastomer or a be made of another flexible material that yields somewhat and ensures a good dry seal against the floor 35, to catch any liquid on the scrubbing brushes comes by so that this liquid is collected. The front apron has a rib 74A that engages the rear apron, when the soles are under the action of vacuum to prevent the vacuum from breaking off the ends of the Crushing device is shut off. The front apron points

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i.chlitzc open, so that liquid can move between the eyelids. The double brush arrangement now £ f niin ;; it in practice did most of the! Jchrubbflücrdgkcit on and fnlnH rie. Sum Pehulte r, and the rear Quetrcheinirichtung can not be lifted from above: \ floor.

Jin ', .iMQgi-Tallive Tj (^ iehe l ^p i {f. 1, J- and <-j) ritst nn fjccioKter ,, share a vehicle, and he vi :: el from ainoji H ^ dr ^ uliknotor 7! 3A powered. ΙΊΐηο '.'pu £; lcitun £; vev / bJiOnt. G <bl ' ^r .ac with a ^f .ch. lutzuacoertank, the rcheartircb at ¹ JG {? onci.ct irt and the clxi J. "αϊ 1ε ruf den '.aliraen under u <-r T. < rlioinuifrplatte ί>ίί:; ί. Z) iv-er ί'- '-ι: ¹ i "t riit a: ·? Pilll ^ anner at the CV rr ■ «i ' ^: " c ^ orrclilor.'ren and p.li (; cciicliiet. 3) io j? Üllkain; ner ir: t with a, nucleitun ^ · 77 verrchnn, ö. io of her ircf? aur Aur.ga-n ^ cred te i "'U> rL. Iiirj Jy. ituiif 77 bofiuc.et nicli about the]? lüf-ni £; keitE? spie {jol. ie e. '. ftrckt rieh from the drive unit, vo äer> _C: iiiiutzuaE ;: ertfinl: nitat, back to the .. scrubbing unit, uia untor never Er? Jinenplatte 4? '' ^ lead. ^r n end of ..cu £ j leitunc 77 sits a Y-shaped s, ngof: chlof: reno P.ohranordnun · ^, · 7 ^ ·· Pas ". -P.ohr, dar; from the i'au ^ leituu. ¹ - "77 l'.cv.jit, i; i subdivided unc ¹ . Tivci has vertical sections 7'- ' ^ulul 7 ^ I ^- . sh-.r Aebntihnitt 7 ¹ - '»i leads down to the ί clinutpibcl" 1L <ν CI. JDan Tundo die? c: Ab-Gclmittr lie £,: i- in ^ erin ^ cn distance v \ h: - Ca .i Boden de; T-. H '^; ltcrr and int of a love 79 (in C ^ o ¹ "" - ³ ·' urführungunr) u.ijeben, dnc ßroCc iJeluiiUtzpartikel heraurl: "lt _f - :: ie ff ! ¹ in Γί ^ ¹ . !; c " ^c " nri ^ ii: ·· '.-.

The section 7 ^ Γ extends nicli: ■. · ■ oh uim'.j. curch one in i.clwutnbchL'ltor 6 ^! j and int separable; iii a rait 7811 to a lOftstchonden llohv ^r ("0 Gvlaxopt ^ lt, ö.pf? an ironi- e'.io Undpfirtie has. The lower Lnöc de 'iofvftrJiendcn RoI η τ. γί" · (' Erf stretches eich zviachen den Lchürzenem '('], uu iu Tcnnl a; nn ^ virtuni 'aeurzutiben, the branches irt the parts 7Ί de.r''^ uctcchcinrichiiif un the rear linden of the Iianchine and then lead forward on the rails of the hardline in order to direct the surface to the middle of the machine

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Liquid from the bottom 35 that remains from scrubbing. The liquid travels toward the rear center of the squeezer 70 »enters the chamber between the front and rear of the squeezer and then passes through tube 780, section 78B and into Y-section 78 and on into conduit 77 and sucked back to the dirty water tank where the liquid is collected. Accordingly, any liquid drawn into container 65 by brush 46 will be drawn up through tube 78A. A screen or rust protector is provided on tube J8k, if necessary, to prevent dirt and debris from being picked up by suction tube 78A. The rib 74A. prevents the front apron 74 from collapsing and the suction at the ends of the squeezing device from being interrupted. 70.

In addition to the rear squeegee, squeegees are provided along the sides of the scrub unit. As shown in Figure 3, a side crimper 80 runs along the right side of the unit attached to the frame 41 and a side crimper 82 runs along the left side of the unit. The device 82 is attached to the door 60 so that it moves with the door. Both squeezing devices 80 and 81 are provided with end sections 80A and 81A as shown in FIG. 3, which go to the inside and the front edge of the forwardly extending end sections of the rear squeezing device 70, respectively. The scrubbing fluid collected along the side squeegees is then directed to the rear squeegee and then further toward the center thereof for pickup.

The squeezing devices 80 and 81 are mounted in a novel manner, such as that in FIG. 7ig. 7 and 8 is shown. The side squeezing devices each consist of upper frames 82 and are mounted on leaf springs 83 which are attached to the frame 82 and also fall on a suitable part of the main frame 41

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the squeezing device 81 is attached to the door 61. The leaf springs allow the flexible ^ chüraenpartie 8 / the / ue sub-device, which is attached to the frame 82 ir.t, a sideways movement across the floor and a slight I-compliance in a lateral direction so / ie a movement up and down in a linear direction, without twisting the "pulling device, extensive staying and wearing is caused

The leaf springs also ensure a certain yield when the Unit 12 swings out sideways at the end of a trailer, like a trailer does, like for an automatic setting on the Tercchleij3 the brushes. The leaf springs compensate for this wear and tear without manual adjustment.

Small brushes 85 are attached to the frame 82 and sit along the main brushes. The parts of the JLeitenquetßcheinrichtung are each formed so that the flexible sections 84 extend at an angle outwardly from the frame 82. The flexible sections extend outwardly as shown in Figure 8 and the brushes 85 attached to the upper frame 82 extend inwardly toward the main rotating brushes 45 and 46 are arranged to engage the ground that is being swept and also lie close to the end bristles of the rotating ones Main brushes 45 and 46 · This action ensures that the Dirt and debris is prevented from getting around the ends of the main brushes around, and also prevents dirt and debris from getting out of the area between the brushes <5 and 46 to get lost under the crushing devices himqg, when cornering and the rotating brushes slide sideways.

The downwardly extending flexible sections on the squeegee ensure that the side portions are kept free of sohmuts and debris, and also that the

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I / Rubbing liquid held within the unit 12. The ΤρΛ- ■ night that RACH erntrecken the flexible portions to the outside, makes it easier for the flexible portions 84, in contact, to remain i.it öcn bottom 35, the flexible parts to the vo L'eitcnnuetScheinrichtungen at 8OA and 81A go inwards at an angle to lie within the posterior cjuetsch device (see figure 1). The outward inclination of the? Flexible section emollient: the sections also allow them to follow the floor when furrows are driven without being turned inside out and coming out of the intended position. When turning the vehicle, the crushing devices slide significantly sideways. The straight, flexible areas tend to fold inwards or outwards when this happens, and the pinch marks then move out of place and the good seal is lost. The outward inclination of the flexible sections prevents this.

The scrubbing unit 12 is in independent Veise with the drive unit connected, "while an arrangement is shown- rear, For example, the unit 12 can also be positioned in front and pushed instead of pulled. Those described in the scrubbing unit Desires are beneficial regardless of whether there is unity in a front or rear arrangement, however, a rear arrangement allows the drive unit 11 to be in a dry surface to run. The coupling 13 is shown in detail. 2, 3 and 6 shown. It has two spaced apart U-profiles 87, which are attached to the upper plate 42 of the frame 41 and extend up to a control stand to build. It should be noted that these U-profiles sit essentially directly over the Querrahraenstück 43, which is transverse extends over the frame.

The U-profiles 87 in turn have a U-shaped Ilauptzieh- and lifting coupling 88, diö with a bolt 89 is articulated to closed. The bolt 89 extends eich in the transverse direction.

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The coupling 88 is not straight as shown, but rather it has a bend in order to have freedom of movement, and the opposite end of the coupling 88 is articulated with a bolt 90 on a bearing part of the frame 14 of the drive unit. In addition, the scrubbing unit is connected to the drive unit by two towing couplings 91 and 92 connected, the joint rod ends with a suitable part-spherical Have seat. One ends of the tow bars are attached to suitable eyes 93 on the main frame of the drive unit 11 attached, and the opposite ends of the coupling 91 and 92 are attached to suitable eyes 94 on the frame plate 42 of FIG Scrubbing unit attached. These tow couplings hold the scrubbing unit in the intended position when it is pulled over the main tow coupler 88, and they also determine the angle of the scrubbing unit with respect to the floor 35 when the scrubbing unit is raised.

The scrubbing unit is stored via the coupling 88, and this coupling can twist and give way to allow one end of the scrubbing unit to wander up against the other while she drives over irregularities. The paddocks 91 and 92 allow this movement.

Raising and lowering of the scrubbing unit is determined by a hydraulic cylinder 95 which can be single-acting because it only needs to raise the scrubbing unit. The weight of the scrub unit causes it to move back down. This hydraulic cylinder 95 is connected at 96 to the main frame of the drive unit. The cylinder 95 has an extendable and retractable piston rod 97 which is articulated at 98 on the coupling 88.

So when the drive unit is driven and travels over the ground, the coupling 88 pulls the scrubbing unit, which is arranged in front of scriptures, and it exerts a train on it, while if necessary a wandering of the unit over obstacles

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is made possible.

As shown in phantom in Fig. 2, the trailer can be lifted. The tow bars 91 and $ 2 determine the angle of the scrubbing unit from the floor when the scrubbing unit is lifted up. When the coupling 98 is lifted into the position shown in phantom, the rear portions of the scrubbing unit are shown to travel much higher than the front portions to provide clearance in the rear when the vehicle drives up a sloping surface.

A safety lock 100 is pivotable on the same bolt 98 as the rod of the hydraulic cylinder is supported between the legs of the coupling 88 and is driven by a push / pull pitch wire 101 actuated, which is similar to that of a common Bowden cable. The adjusting wire can be moved into the position shown in solid lines according to Fig. 2, and then the cylinder 95 is actuatable and can be retracted when the control valve for the cylinder is actuated will. When the cylinder 95 is extended, however, the adjusting wire 101 can be in its position shown in dashed lines from a Operator are pushed, and thereby the safety lock 100 moves into the position shown in dashed lines, in which the End of the lock 100 rests against the end face of the cylinder itself around the rod to prevent retraction of the rod. This will hold up the scrubbing unit even if the hydraulic pressure fails to provide adequate security. The scrubbing unit is lifted up and locked in the lifted position to enable quick transport without that the brushes and the squeezing devices attack the surface 35.

The control line leading to the cylinder 95 can have a suitable valve 102 which can be adjusted so that only a certain amount of the lifting pressure acts on the cylinder 95. This means that the operator can change the load from

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Cylinder 95 is carried so that the downward pressure of the scrubbing unit on the brushes 45 and 46 by adjustment The valve can be changed by increasing the size of an IT bypass orifice changed and thus the pressure in the line 104 changed and the cylinder 95 is caused to be a larger part the weight of the scrubbing unit. It should also be noted that a manifold 105 (Fig. 9) distributes the flow from the pump 3I so that that a low flow rate, for example 3.85 l / min, flows through valve 102. So when the motor 30 rotates more slowly so that the output from the pump drops, it will Maintain small flow anyway, and cylinder 95 will not suddenly sink due to reduced flow the control valve 102.

Bin feature of the drive unit is that the front housing has above the engine a central opening 109 108 which is provided with a sealing member 110, the inlet opening Dafis at the outer periphery to the fan of the M _o gate (not shown) adjusts so that there is no possibility of air being drawn into the motor from around the interior of the housing 106 so that clean fresh air is always blown over the motor. The engine is intended as a common air-cooled engine. The warm air can be sent outside through suitable ducts.

In addition, the carburetor for the engine can be arranged in such a way that that its intake side is open directly to the air cooling housing for the fan of the engine, so that a fresh air flow through the opening 109 enters the carburetor, which charges the engine somewhat. The bonnet with the opening 1o9 can of course be removed for maintenance.

A sheet metal housing I07 can be provided over the scrubbing unit. Housing 107 may also be made of plastic if preferred, and has a removable cover 107A that attaches to the

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Main part of the housing 107 is articulated and which can be raised and lowered to get into the dirt container and to take it out for cleaning or to service the functional parts of the push-button unit. This cover is in Pig. 1 shown in phantom in the open position. The cover holds the after fastening with the help of suitable clamping devices Dirt container in the prescribed position.

9 shows a schematic representation of the hydraulic system for the drive parts of the machine. It has already been mentioned that the machine uses two different hydraulic pumps and these pumps are shown schematically. The motor 30 drives the hydraulic pump 51, which is the hydraulic pump for the auxiliary functional parts, and the motor also drives a variable displacement piston pump 29 which is used to drive the bath motors 17 and 18 in a closed circuit. The variable displacement pump is a commercially available pump operated by a lever operated by a foot pedal 21 that regulates the amount of oil that is pumped and the amount of oil pumped by the motors 17 and 18, the motors being arranged in parallel according to the position, determines the traveling speed of the vehicle. A suitable hydraulic supply circuit 28 can be installed in this circuit in order to compensate for any leakage losses and the like. The supply circuit is an auxiliary circuit supplied with the pump that is supplied with the pump by Vickers Mobile Dievision of Sperry Hand Corporation. The pump has an ^N wobble plate ^N control for regulating the amount of pressure medium conveyed into the motors 17 and 18. The pump is a pump that can be adjusted beyond zero point, which can reverse the direction of flow to the motors in order to change the direction of rotation of the motors and to create a neutral position or a non-delivery position.

The flow divider 105 is built into the pump 31, and he

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provides a set low volume, for example 5.85 l / min, at a pressure of 70 kg / cm to the hydraulic cylinder 95 for the control of the raising and lowering of the trailer a middle position, in which the flow from the flow divider 1o5 only goes through the valve and leads to a return line, is adjustable, but the pressure medium flows through a valve 102B with a variable orifice, which determines the counter pressure in the lines leading away from the flow divider 105 A safety valve 102C is also provided on the line to provide protection against high pressures.

When the valve 102A is shipped to the position in which the with the side marked 102D is in alignment with the line 104, the hydraulic cylinder 95 is acted upon with pressure medium, but only with the pressure produced by the adjustable valve 102B as back pressure. This causes the rod 97 of the Cylinder adjusted with a fixed, manually variable pressure, so that the downward load on the brushes can be regulated in the scrubbing unit by adjusting valve 102B. When the valve spool is in opposite Direction is shifted so that the portion 102E comes into alignment with the line 104, the cylinder 95 can with the full pressure of the safety valve setting of the valve 102 can be applied in order to lift the scrubbing unit in a form-fitting manner. This means that the scrubbing unit can be held in an upright position and when the valve spool 102A is again in its center position is traced back, as shown in solid lines is, the line 104 is blocked in the middle section of the valve, and the flow from the flow divider 1045 is passed through the valve slide into the series circuit through line 10J.

The cylinder 71 for the rear pinch bracket 70 is connected to the line 105 through a valve 71A. These"? Cylinder is

209812/1168

double acting, and the slide valve 71A is a normal four-way valve, the "both lines leading to the cylinder 71, in blocked its middle position and that pushes out the piston rod of the cylinder 71 in one position and in the other Position pushes the piston rod of the cylinder 71. The unit normally operated by adjusting the valve to push the piston rod outward. Sin suitable safety valve 71B is also provided in valve 71A, and it is so set up that it opens when the pressurization of the piston to extend the piston rod of the cylinder 71 a Exceeds setpoint. The setting of the safety valve in valve 71A thus determines the force with which the rear squeezing device is applied, and this pressure is normally

set very low, for example to 3 »5 kg / cm.

The various valves are with the drain or reservoir connected via lines that are shown schematically in%. The storage container 33 is also shown schematically.

The rest of the output from the auxiliary pump 31 forms a larger volume of flow, for example a flow of 27 l / min at the engine speed of the pump 31. This secondary flow flows in a circuit which drives the brushes and the suction fan. The flow divider 105 takes precedence so that even when the motor 31 is running at low speed, 3.85 liters / min. Flow to the adjustable valve 102B to make it effective in maintaining the trailer at the desired pressure. This flow rate of 3 » ⁸⁵ l / min is a constant flow even when the motor 30 is idling so that the setting of the adjustable valve 102B can be kept constant.

The pump 31 is used to drive the brush motors in normal situations and the fan motor in a hydraulic line circuit used. For this purpose, a control valve 113 is provided, and in his

- 22 -

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In the middle position it only directs the flow from the pump 31 on the secondary side, which is indicated on the line II4, to the reservoir 33 back. However, when it is moved to a position in which the section II3A is in alignment with the middle connecting lines, the branch line 1I4A leads in the direction of a blocked opening II4B. The promotion the pump 3 "I on the secondary side then becomes the motor 51> then to motor 52 and then to motor 75A for the suction fan in series directed. The other side of the motor 75A then leads back to the reservoir. This is the normal function, in which all motors run simultaneously, those of the scrubbing brushes just like that of the suction fan.

When the valve 113 is adjusted so that the section II3B in comes into alignment with the central portion, it provides means for stopping the brush motors 51 and 52 and allowing them to run alone of the motor 75A for the suction fan. That can then be desirable when no scrubbing is to be done, but suction is to be carried out, for example to suck up liquid in a standing position or even for sucking up liquid with the squeezing devices while the unit is in motion via a floor · In this case, the branch line II4 conducts the pressure medium through a check valve 115 into a line 116 which is connected in series between the motor 52 and the motor 75A.

m is switched and directs pressure medium to this point. Since this Pressure equal to that in line II4 through motors 51 and 52 is, the motors 51 and 52 do not rotate, but rather remain stand, and the entire delivery of the pump 31 on the secondary side goes via line 116 to motor 75A to drive that motor of the aspirator. The valve II3 can again in the neutral Position when the unit is only idling and not used at all.

A low-pressure IT bypass valve II7 is in the return line 119 provided, which comes from the valves 102 and 7IA, to a

209812/1168 _BAD original ~ ^2? ~

2H5633

To pass filter 118 in the return line in the I bypass flow, if the back pressure in the filter exceeds this setting.

The wheel drive circuit is thus separate from the accessory circuit, and the variable tolumen pump only drives the had motors, and the setting of the pump determines the speed at which the wheel motors run. The pump can be adjusted using the pedal 21 in order to adjust a swash plate. The pump 2 $ also drives the unit in the opposite direction.

The auxiliary pump 31 has a priority circuit through the flow divider 105 going ^{over the Ci} cylinder 95 first so that the floating hold of the rear unit can be precisely adjusted by adjusting the variable valve 102B accordingly. The unit is thus driven completely hydraulically in its auxiliary functions and in its ground drive functions.

In operation, the drive unit is turned on by turning the front Steering wheel steered. The scrubbing unit can be moved by the drive unit up to 38 mm against a vertical side wall to scrub and it usually drives around corners.

The washing liquid tank has a valve that can be opened can so that the washing liquid passes through openings in the manifold 37 to the outside, and the hydraulic motors for the scrubbing brushes 45 "and 46 are activated to clean the scrubbing brushes 45 and to rotate 46 in the directions indicated by the arrows. The drive unit is then driven forward and dirt and debris on the floor 35 is picked up by the front brush, brought up by the second brush between the two brushes together with the tyaschefluid which is in contact with the ground has come and scrubbing is occurring. The scrubbing fluid is reused by drawing some of the fluid over the front Brush is steered and returned to the floor. The frame

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2H5633

divider 42 divides the flow of the liquid and directs the dirt and waste to the rear in the dirt container. The frame dividing piece 43 is arranged so that it is closer to the front Brush is located on its upper parts, and this deflects debris and debris along the rear surfaces of this frame piece, to the rear brush into the dirt container behind to hike. Liquid gets forward over the bristles of the. front brush 46 carried in order to be reused in such a way that that it hits the floor 35 while the scrubbing is in progress. On the frame dividing piece 45 and along the underside of the Liquid collecting plate 42 drips at the edge of the frame piece back into the front brush and is guided over the brush. A Some of the liquid is returned to the from the rear brush 46 Out of the dirt container, which is close to the bristles there: brush, and this liquid is sucked into the recovery tank, ie hose connection 78A.

Liquid remaining on surface 35 is collected by the squeezers as the scrub unit advances and is trapped between flexible sections 74 and also drawn into the recovery tank through tube 78C and tube T&B.

So the floor is swept and scrubbed clean and left dry. The scrubbing unit can also be used as a wheeled sweeper with a double brush system by simply removing the flow of liquid is switched off in the manifold 57. When the brushes when running around, they have dirt and trash up and down in the dirt bin as the unit moves across the floor. The rear squeezing device can be lifted and the Suction can be used to suppress dust if necessary.

The speed of the scrubbing brushes, the relative size of the two scrubbing brushes, the distance between the brushes and the vehicle

209812/1168 "* ⁵ "

.25-2U5633

speed of the unit are all related to perform a good scrubbing or sweeping function. The peripheral speeds of the brushes should be more than 3JO m / min.

The use of two brushes running at the same speed running around causes the liquid and dirt to be thrown almost just above the surface. The used deflectors or Guides then determine the direction of movement of the liquid and dirt. When one brush runs faster than the other, but both are the same size, the dirt is deflected at an angle towards the slower brush. If with When working with two different sized brushes, the larger brush directs the dirt over the smaller one at an angle Brush. The speed and size of the brushes can be chosen to suit the desired trajectory of the liquid and so of dirt when scrubbing. The brushes are preferably close together, but they can be used to pick up dirt be arranged at a distance. The small distance supports the collection of liquid and fine dust.

The turning of brushes with a diameter of 295 mm with a A speed of 450 to 550 rpm results in a good balance between the ability to absorb dust, dirt and moisture and waste and prevents misting of the liquid because of too high a speed, which is mainly just power swallows. In other words, when the brushes run very quickly, the sohrubbing liquid tends to be misted, and the Power consumption increases steeply compared to the ability to Scrubbing and cleaning.

Another feature in the scrubbing fluid return is that the guide or divider 43 is positioned with its tip overlying the front brush in the first embodiment of the invention so that the scrubbing fluid is returned. The liquid drips from the

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2U5633

Tip on the brush and then is returned. This is a desirable feature and the location of the center guide it is therefore important that the tip, which extends parallel to the axis of rotation of the brush, is above the bristles of the brush lies and "liquid dripping off from this tip" lies on the back the revolving brush falls, which in this case is the front brush 45. If with one arranged in front Unit is worked, a return of the liquid can be achieved that suitable means in the dirt container are provided, which return part of the liquid.

Referring to Figure 11, there is shown another automatic arrangement for determining the downward pressure applied to the scrub brushes. In this device, the brushes 45 and 46 sit in the frame as before, and the hydraulic motors 51 and 52 are supported on the frame 4I. In this case, the hydraulic pump 31 is shown schematically. It acts on the cylinder 95 'which acts on the coupling 88.' In this case, the feed line to the cylinder is a line 150 which is connected to a suitable control valve, which is shown schematically at 151. This valve also determines flow to brush drive motors 51 and 52 through line 152. Motors 51 and 52 are shown hydraulically coupled in series. A cylinder bleed line 153 is connected to the line between the two engines 51 and 52, and it is in communication with a line 150 via a check valve 154. A small, fixed restriction 154A restricts flow in line 150 through the check valve. The adjustable flow throttle valve I55 (a variable flow valve that can be operated by hand) is used. In normal operation, valve I51 is in a position where flow from the pump goes through motor 5I to drive it and then to motor 3t through line I52 and thence back to the reservoir. The pressure of the motor 52 acts through the

- 27 209812/1168

Bleed line 155, creating flow through the check valve 154 and the restriction 154A is effected. The river back to the Reservoir through line 150 is set to one ¥ is throttled because of the setting of the variably throttable valve 155. The counter pressure thus acts on the cylinder 95 and creates a lifting force on the trailer.

If the load on engine 52 increases because of a heavier Kirstens, the increased pressure in line 155 acts through the check valve to increase the pressure in line 150 at the lower end of cylinder 95 ^ZVL , thereby increasing the force exerted on the coupling 88 acts. This tends to raise the scrubbing unit 12, which in turn reduces the downward force exerted on the brushes and consequently the power required to drive the brush motors. A balanced condition is established in order to keep the load on the motors 51 T * nd 52 below a maximum value. Thus, there is an automatic reduction in the load on the brushes when the pressures causing the motor 52 to run rise to a point * which exceeds that at which the normal pressure in the line 150 is. The check valve 154 naturally prevents flow through the line I50 into the motor circuit, in which case if the scrubbing unit is to be lifted to effect transport, the valve 15I can be moved to a position in which the pump is connected to the line I50 is. The pressure then causes the piston rod of the cylinder 95 to extend and the writing unit to be raised.

An automatic compensation to prevent the engine 50 from stalling is therefore provided, if the load applied to the schematic The pump shown acts according to the load on dm Scrubbing brushes is regulated.

In Fig. 12 and I5 is another embodiment for the

209812/1168

Dirt container shown. As shown in Pig. 12, the unit 12 is modified so that the frame 41 is a transverse rear baffle 125 carries, which is firmly connected to the frame at its upper rear parts and extends downwards and extends forwardly and is secured between the side members of the frame. The baffle forms a rear one Wall of the dirt container 126, which sits behind the rear brush 46. The dirt container has a transversely extending one front plate 127 which is fixed between the side parts of the frame 41 and immediately behind the rear brush 46 sits. Although the suction hose is not shown, it is also used in connection with this container.

A movable lower plate 128 is used for the container and is sealed against dust along the front and rear edges of the rear plate 125 and the front plate 127. The lower plate 128 is mounted on a centrally mounted rod 129 which is pivotably mounted on a suitable eye 130 on the lower plate and also pivotably on a protruding support 13I which is attached to the rear plate 125. The rod 129 holds the lower platen in place when the platen is in its full line position as shown in Pig. 12 is located. The position of the lower plate 128 is determined by means of two spaced-apart coupling rods 134 which are pivotably mounted on spaced-apart eyes 135 which are attached to the front edge of the lower plate 128 and which are furthermore attached to outwardly extending, in Spaced levers 136 hinged at their ends, which are part of a crank device. The levers are attached to a rocking shaft 137 which is pivotably mounted on frame parts on the rear frame parts of the trailer 12. The swing shaft further has a central lever 137A, which is fixed to the swing shaft. The lever 137A is attached at 138 to the outer end of the rod 139 of a hydraulic cylinder 140. The lower end of the

-29-

Linders I40 is mounted on the frame of trailer 12 at 14I.

The cylinder I40 can be extended via a suitable control valve 144 and withdrawn, which acts on the cylinder from a pressure medium source 142 from. With the cylinder extended, like that in full lines in Pig. 12, the levers are in their yollines position and the couplers I34 push the lower plate 128 down to close the opening between the front plate 127 and the rear plate 125 conclude. This means that all dirt that comes from the brush 46 is captured and held in the container, and the Scrubbing fluid is also collected and taken to the suction line removed, as has already been described.

However, when the dirt bin becomes full, the lower plate 128 provides a means for emptying the dirt bin without lifting it out by hand, as was done in Pig earlier. 4 has been shown. To do this, valve 144 is operated to return cylinder 140 to its retracted position, shown in phantom, and this in turn raises the levers, as shown in phantom, causing the lower plate to wrap around the Connection between the coupling 129 and the brackets 1JO pivoted, and there is also a pulling up of the front edge of the plate 128 so that it tilts upwards, as shown in phantom in FIG. The coupling 129 also pivots about its connection with the supports 13I and it holds the rear hand of the lower plate directed downward so that the lower plate 128 extends almost substantially perpendicular to the ground on which it is being driven, resulting in complete dumping leads to any dirt in the container without removing the container itself. The use of the elevating rear squeezing devices is therefore very important here because the Qaetscheinriohtung can be lifted over the dirt when the ßchrubbeinheit moves forward. This device for dumping can also be used when the main dirt

i68 " ⁵⁰ "

-50- 2U5633

container is located in front of the brushes, as shown in Fig. 21 iet.

As an alternative, as shown in FIG. 14 and 15 instead of the hydraulic cylinder I40, a hand lever 145 can be pivoted in part I46 be mounted on a portion of the frame for the trailer, and a coupling 147 extends rearwardly to the trailer and is on the point 138 connected to the rocker shaft lever. A movement of the hand lever by the operator produces the same effect as the hydraulic cylinder when moving back. Through this the lower platen 128 is moved to a tilt position and this can be done by hand. This is just a Another method for emptying by manual control in contrast to a power drive with the aid of the cylinder HO.

In Fig. 16 and 17 bearings for the scrubbing unit 12 is shown opposite the drive unit 11 such that the scrubbing unit is moved transversely from side to side can, if so desired, to give greater lateral freedom of movement when making sharp bends in one or the other in the other direction with the drive unit 11 This is shown schematically for illustration, and it will be understood that the steering and drive mechanism for the drive unit 11 is the same as previously described. The storage for the scrubbing unit is modified to form a storage 158, in which the coupling 88 is replaced by a coupling I60, the the coupler 88 is similar, except that it has an outwardly extending end lug I61. Instead of the bolt and the Upright profiles 87, the sewing device has two upright posts 162 which are supported by it and which are in a substantial manner Are spaced and wider than the paddock I60 are. The upright posts are firmly connected to the transverse frame plate 42 and are sufficiently robust and reinforced, to support the entire weight of the scrubbing unit 12. A cross shaft 163 is fixedly arranged between the posts 162 (it can optionally also be provided removable) and extends

- 31 -

209812/1168

-31- 2U5633

by the downwardly hanging legs of the bracket 16O, such as the bolt 89 extends through the legs of the bracket 88. The shaft I63 is, however, slidable in suitable hubs on the Legs of the holder 16O stored along.

The position of the scrubbing unit on the longitudinal axis of the shaft I63 along A is determined by a double-acting hydraulic cylinder I64 which is attached at I65 to the outer end I6I of the coupling I60, and the cylinder I64 has an extendable and retractable piston rod 166 which is connected to a Bracket is connected, which extends from the lower end of the unit 12 upwards, so that the cylinder is in the intended alignment. The cylinder I64 can be set by a suitable valve 168 from a pump 159 and a gate container 33 in the usual manner. The coupling 91 and $ 2 are, as already described, articular ends at their outer ends, with which they are fastened to the frame of the trailer 12, and these link ends are part-spherical seats in a conventional design, such as in 'Fig, 16 and I7 is shown. The entire scrubbing unit can be moved axially along shaft 163 by either extending or retracting cylinder I64. In normal operation, the side edge of the trailer is offset from the main part of the vehicle at I7I, so that it drives along a wall while the drive unit drives from the wall at a distance. When moving away from the wall , cylinder I64 is actuated to move edge I7I of the viand so that both side edges 170 and I7I of the scrubbing unit are in alignment with the sides of the drive unit. A sharp bend can be made because the scrubbing unit does not engage the wall directly, but rather leaves some space to begin the process before getting close to the wall. The offset also keeps the drive unit away from the wall, making maneuvering easier.

By adjusting the cylinder I64 in a corresponding manner, the push-pull unit can be shifted axially along the shaft I63.

- 32 -

209812/1168

to achieve the desired positional arrangement. The moveable ones Properties are desirable, indifferent, οι »the Scrubbing unit is seated at the front or rear. The unit can be operated by placing the scrubbing unit in its dashed line ten lines is in the position in which the edges 170 and 17I are in alignment with the edges of the drive unit.

The cylinder I64 can also be operated automatically by a solenoid valve 156 are operated, which is switched by switches 157, the in turn are switched by the vehicle steering arm 27 when the arm to a certain extent in one or the other direction has been moved.

There could also be switches 158 on the sides of the scrubber unit used to control a solenoid valve 159 so that when the trailer hits a side wall surface, the cylinder I64 is adjusted to bring the trailer into the appropriate Direction to move away from the wall.

In Fig. 10 there is shown a further modification of the device according to the invention which is used to make sharp bends. Here the drive unit 11 has wheels, as well as drive motors 17 and 18 and the steering arm 27. The motors 17 and 18 are normally connected in parallel and both run in the same direction. A TTm control valve 175 is on to allow normal parallel operation with both motors running in the same direction or to cause one to run in the opposite direction to the other. The TTm control valve is shown in the return position . The valve 175 is controlled by a solenoid 176 to return to the return position so that the motors I7 and 18 run in opposite directions. When the scrubbing machine is to be turned in the direction indicated by d4 and arrow 177, the outer end of the steering arm 27 comes into contact with a switch 178 when the arm reaches its full turning position, thereby energizing the solenoid I76

-55 209012/1168

move valve 175 to its timed position as shown, thereby causing the machine to make a much sharper bend because of the counter-rotating drive of the two wheels; a reversal in the opposite Ri rect is possible by a further switch (not shown) is provided, on which the steering arm engages 27 when the R _a d is rotated for steering in the opposite direction. By reversing the flow to wheel motors 17 and 18, these sharper bends can be easily achieved. Normally, the motors run through valve 175 in its through position.

In Pig. 18, 19 and 20, there is shown an air blower 181 which is used is to direct a jet of drying air or gaseous medium onto the floor 55 as shown. In a Form, the motor JO is about a Brennkaraft machine, and the drive shaft is via an engageable and disengageable (coupled) belt drive, shown schematically at 190 is connected to a centrifugal fan 191, the one Pressure outlet 192 has. The pressure outlet is via a pipe 195 with connected to a cross tube 194. The cross tube 194 has moved down extending pipe sections 195 imd 196, which in front of each of the Drive wheels 15 of the drive unit sit. The downwardly extending tube sections 195 and 196 terminate in flat ones Slot nozzles 195A and 196A, which are close to the bottom 55 immediately sit in front of the respective wheel 15 to follow a jet of air aiming at the bottom of the floor and blowing any liquid on the floor 55 out of the way and creating a floor drying effect due to the moving air.

At the front end of the drive unit 12 on the steering part, the ear 192 is connected to a flexible hose 197. An after extending down pipe 198 is then connected to the support frame for the wheel 16, which is steerable and is moving naturally, so that diesec to be sawn downwardly extending pipe 198 with the Had

- 54 -

203812/1168

2H5633

away. The tube 198 has a nozzle 198A which is also flattened and sits right in front of the steering wheel. The steering wheel 16 is also immediately in front of a dry path provided with the had, even if it is steered straight forward from its position, as shown in phantom in FIG.

As an alternative and / or as a supplement, a selector can be used to remove heated exhaust gas from the engine's exhaust system 30 into the pipe 192 to direct. This is shown schematically, and it goes without saying that the fan can be separated or omitted entirely and only the exhaust system for heated dry ones Air is used if so desired. Correspondingly, the exhaust system can optionally be left completely out of the pipe circuit and only work with the fan 191.

The exhaust pipe 202 of the engine JO is provided so that it normally has an outwardly extending portion 203 which is connected to a suitable muffler, if desired, or merely leads to atmosphere. A selector valve 204 is provided between the engine and the outwardly extending end of the exhaust pipe. The selector valve unit 200 (FIG. 19) has a flap valve 205 which is set by a lever 206 which can pivot about an axis and can be moved between two positions. A drying gas pipe 207 is ^m i "k ^em pipe 202 and further connected to the pipe 192nd The flap valve moves between two positions, one in which it blocks the exhaust pipe 203 while the tube 207 remains open, and a second in which the pipe 207 is shut off while the pipe 203 remains open.

When the use is desirable of the exhaust gas as a drying medium, for example if it is heated gas from the exhaust necessary to provide a dry surface, the belt drive can be separated 190, so that the fan is not running, while the fan blade block of course substantially the

- 35 209812/1168

-55- 2U5633

Outlet to fan 191. This then enables the ten- ' tilhebels 206 in its position shown in solid lines in which the Flap 205 closes the llohr 20J and the exhaust gases into the pipe 207 printed to be veiter through the pipe system 192, 193 »195» 197 and 198 to go. That means that hot air is down on the floor 35 in front of the wheels through nozzles 195A, 196A and 198A is blown.

If you want additional air or if you want to mix the air, the belt drive 190 can be connected, and then the fan is also used. That creates a certain back pressure on the valves of the motor, but the fan pressure of the fan 191 does not need to be high because with an open pipe system is used, which leads to the nozzles, which direct the air jets down to the ground.

Usually either exhaust air or forced air is used, occasionally, however, they can be mixed.

This enables the floor 55 to dry if it was previously got wet, flooded, or wet before scrubbing.

A feature of the invention is, of course, that the scrubbing unit including the manifold for the scrubbing liquid is there is a detergent solution or water, behind the drive and Steering wheels of the drive unit so that they normally work on a dry surface, except when the ground 55 has previously been flooded or made wet. With the facilities according to the invention, namely the nozzles that direct air jets in front of the drive and steering wheels, the unit can always still work on a dry surface, even if it has been flooded beforehand, and the surface is then scrubbed, to remove any streaks caused by the drying air and the drive unit wheels.

209812/1168 _ _{; 6} b

-56- 2U5633

In Fig. 21, a modification of the invention is shown in which the Scrubbing unit can be provided with a dirt container that sits in front of the front brush with respect to the direction of travel. the Scrubbing unit 214 can be configured substantially similar to FIG be those in the foregoing embodiments of the invention has been described, and it has a frame 215 in the same Construction like the frame 41 · ^ he frame 215 extends in the transverse direction in relation to the direction of travel. Brushes 216 and 217 are mounted on it for rotation in the direction of arrows 218 and 219. In this case, however, the unit moves in the direction of arrow 220 so that a dirt container 221 sits in front of the brush 217, which in this case is the front brush.

The scrubbing unit can either be pulled or pushed (in which case it is pushed) and, as shown, a stand 222 includes a coupler 223 which is a push coupler attached to a drive unit 12. The thrust coupling is pivotably mounted on the drive unit and is raised and lowered with a cylinder 95. Control couplings 224 are also provided to hold the scrubbing unit in place. The container 221 has a tilt bottom, as has been described in connection with FIGS. The ground and the paddocks have the same haulage areas, as pie in connection with FIGS. 12 and 13 have been mentioned. Other types of tipping could be used if desired, or a hand-removable container could be used.

The brushes 216 and 217 are driven by hydraulic motors and are supported by a removable frame part 225, the Frame part 44 in the exemplary embodiments already described corresponds to the invention. The brush bearings are the same, as they have already been described. The brushes are rotated so that the "deflector, in this case 226, larger waste and directs debris forward into container 221 while using suction tube 227 to remove any liquid, which goes into the dirt container 221.

209812/1168 -37-

BATH ORIGINAL

An auxiliary dirt container 23O is also directly on iftmsch provided behind the rear brush 216 which is removable, and as an additional feature, a suction pipe 231 connected to a suction source 75 can also be provided for this purpose is to remove dirty liquid that gets into the dirt container. The container 250 may be smaller than the main container who in this case sits in front of the brushes.

Sine ^ uetereinrichtung 232, that of the rear squeegee 70 corresponds, also sits at the rear end of the scrubbing unit, to wipe up any excess liquid and to apply it with a suitable suction hose in the usual way remove.

So it can be seen that the dirt container 221 can sit in front of or behind the double brush scrubbing unit, and the "oil steering piece" 226 can be arranged in such a way that the desired direction is produced in the dirt throw. Furthermore, the brushes 216 and do not run at different speeds, as do the brushes and 46 · This changes the path of the swept material.

A scrubbing fluid manifold 235 sits on frame 215 the front parts in front of the front brush 217 ^ eI viewing direction in the direction of travel, and dioces distributor pipe receives scrubbing fluid from a lashing water tank to the drive unit and distributed the liquid on the bottom that is being treated.

22 is a simple illustration of a scrubbing unit 240 shown to show that scrubbing brushes of different sizes can be used. Here the frame 24I has a removable one The waste container 242, which sits on the rear end of the scrubbing unit, and suitable means may be provided for removing it. As shown, the container is to be lifted out of the frame. In this case the frame 24I supports two brushes, viz

- 38 -

209812/1168 "bad original

a large diameter brush 243 and a smaller diameter brush 244, about parallel axes for rotation in the direction of arrows 245 and 246. The brushes are driven by hydraulic motors driven, as has already been described, and at the free end the brushes are mounted on a removable frame part 247 ^ which corresponds to the removable part which has already been mentioned. In this case, a steering link 248 is arranged so that that the dirt and waste is directed into the dirt container 242 and some of the scrubbing liquid is passed over the front brush and reused, sine squeegee (not shown) is provided at the rear of the scrubbing unit, and squeeze straps are also located on the slides, as has already been shown and described in the other exemplary embodiments. In this case, the dirt goes and Waste over the small brush, and the rail line from the large brush helps guide the dirt and waste over it away, as does the deflector 248. At the unit can it can be a pushed or pulled version as required, using suitable bearing parts that are not to establish a connection with the separate drive unit 11.

These brushes usually also run at different speeds. The optimal relationship between the brush sizes has been found to be 5x4, and that means that a brush 243 with a diameter of 254 mm works with a brush 244 with a diameter of 204 & B &, and speed ratios of ¹ about 2: 3 rpm have become proved to be satisfactory. If the brush 243, the brush old with the larger diameter, runs at 600 rpm, the brush 244 with the smaller diameter runs at 900 rpm. This gives the smaller brush a greater circumferential speed than the large brush, and this helps carry away dirt and waste in the bin. The large brush throws material up over the small brush.

-39-

209812/1168 _BAD original

The brushes with different diameters can be used in the double brush head unit can be used, and you can also work with different speeds for the brushes. The order the Beh'llters, be he in front of or behind the bailiffs in relation The direction of travel is not critical, though however, one small and one large brush are not used, coil the little brush on the edge of the container, like the one at 250 is shown. Here, in turn, the container 242 can be removed by hand Suitable handles are provided for this purpose, and it is removed directly from the frame 24I. Of the Rahnen is of course structured in the same way as which has already been described. The brushes extend across the frame to get the desired brush width, and the movement of the scrubbing unit can be in one or the other direction, as described, the container at the rear arranged. The scrubbing unit is driven by the drive unit 11 stored, and the drive unit holds the manifold to dispense.-chrubbf fluidity.

The separate scrubbing and drive unit can easily be converted into a front scrubbing machine can be converted. The pull coupling 88 becomes a The thrust coupling and the drag coupling can also be under compressive stress be used. The scrubbing unit can be marked with an H; ~ - draulikz2 "can be raised or lowered *.

The Karchine can work on smooth or rough surfaces, as the Doppelbürstens3 ^r stem rough surfaces well cleaned.

The solenoid valves used to actuate the cylinder I64 on the automatic position arrangement of the scrubbing unit work with suitable energy sources, for example from the vehicle battery. The valves are four-way valves, which are only shown schematically with pressure sources shown schematically.

The four-way valves have neutral positions, the openings to cylinder I64 so that other valves can shut off cylinder I64 can operate in parallel.

2Ö9Ö12 / 1168 claims BAD ORIGINAL

Claims (1)

2H5633 Pat ent calls Floor care machine with a frame which forms a housing, a first and a second rotatable floor care tool which engages the floor and which are each rotatably mounted in the housing about essentially parallel, spaced axes which are parallel to the floor to be maintained, drive means for rotating the maintenance tools in opposite directions, the tools rotating towards each other on contact with the ground for lifting material from the ground, and a container on the first tool and on its side opposite the second tool for receiving from the Maintenance tools lifted material, characterized in that first means (43; 226} 248) for determining the path of the lifted material by the maintenance tools for directing dirt and waste from the floor to be maintained in the direction of the container (65} 126; 221j 242 ) and to allow movement of part of the tools lifted material are provided in a direction opposite to the container. 2. Machine according to claim 1, characterized in that the tools (45 »46} 217, 216; 243, 244) are brushes. 3 · Machine according to claim 2, characterized . that the brushes (243 »244) have different diameters, wherein the first tool (244) has a smaller diameter and sits on the container. 4. Machine according to one of claims 1 to J, characterized in that the first means are a Umlenkstück (43; 226; 248) which is formed by a V-shaped Umlenker, weloher sits above and between the care tools and one after has downward extending apex, which is parallel to the axis of rotation of the tools and sits over the circumference of one of the tools. ^{Va / Ti} 209812/1168 _BA d original ~ ² ~ * - 2H5633 5. Machine according to claim 4 » characterized in that the apex part sits above the second tool (45i 216j 243) in such a way that all the liquid accumulating at the apex part drips off automatically and hits the circumference of the second tool. 6. Machine according to one of claims 1 to 5 » characterized « in that second means (37} 233) are provided for applying a liquid scrub solution to the floor over which the machine travels, part of the liquid scrub solution at least partially in the direction of the second Maintenance tool is deflected, which is furthest away from the container. 7. Machine according to one <fc claims 1 to 6, characterized in that the lifted material is solid or liquid or both and at least part of it is passed into the container. 8. Maschaine according to one of claims 1 to 7 » characterized in that the container (126) has a front, rear, lower and in each case a lateral wall (127,125) and that wall bearing means (129) are provided which support one of the walls (128 ) to move the other walls opposite between a first position to form a dispensing opening and a second position to close the dispensing opening. 9. Machine according to one of claims 1 to 8, characterized in that the container (65, 242) can be removed from the frame by hand. 10. Machine according to claim 6, characterized in that Qaetaohmittel (70,80,81 j 232) for removing Schnrubblösung or liquid from the floor and third means (72 | 83) for storing the squeezing means are provided on the frame. El 11. Machine according to claim 10, characterized in that the 209812/1168 Squeezing means comprise a squeezing device (70,232) at the rear of the tools and that the third means are parallel Swivel arms (72) for mounting the rear squeezing device on the frame and means for lifting the squeezing device from the floor showing away. 12. Machine according to claim 10, characterized in that the third means a pressure medium device (71) for mounting the squeezing means (70) for optional movement in the direction of the ground to and away from it and control means (71Δ) for the pressure medium device to limit the auf.die squeezing means have downward force. 15. Machine according to claim 10 or 11, characterized in that the squeezing means side squeezing devices (81, 82) with flexible, ground-engaging parts (84) and elongated row brushes (85) between the ground-engaging parts and the tools at the ends of the tools in alignment with the space between the tools. 14. Machine according to one of Claims 10 to 12, characterized in that the third means have a leaf spring arrangement (8j) for mounting the squeezing means on the frame for resiliently pressing the squeezing means on the floor. 15. Machine according to one of claims 10 to 12, characterized in that the squeezing means comprise a first flexible, ground-engaging part (84) and a row brush (85) closer to the tools than the first ground-engaging part. 16. Machine according to one of claims 10 to 12, characterized in that the squeezing means have a separate elongated lateral squeezing device (80, 81) along both sides of the frame and in lateral alignment with the tools. 17. Machine according to claim 16, characterized in that the 209812/1168 -4- ¹ O 2U5633 Crimping means a crimping device (70, 232) on the rear fJeite the tools in relation to the normal direction of travel of the Have machine which extends over substantially the entire axial length of the tools and which extends forward Has parts on the side edges of the tools, the side squeezing devices each having rear end parts (80A, 81A) have the respective one extending forward Overlap part and sit between the respective forward-facing part and the tools. 18. Haschine according to claim 2 or 5 » characterized in that the drive means have Hittel (51,52) for rotating the brushes at different speeds for directing dirt and material, which is lifted by them, in a certain movement path. 19 · Machine according to claim 2 or 3 » characterized in that the brushes have tubular core pieces (51B, 52B), that the drive means are formed by hydraulic motors (51» 52) which are mounted essentially inside the core pieces at one of their ends and that separate free-running intermediate pieces (55) are provided which are removably inserted into the respective core piece at its other end, in such a way that the other end is rotatably mounted in each case, with brackets (44) supporting the intermediate pieces for removal therefrom in a first direction and the Core pieces of the hydraulic motors are slidingly separable in the first direction when removing the brackets and the free-running spacers. 20. Machine according to one of claims 1 to I7, characterized in that it has a drive unit (11) with drive wheels (15) and a steerable wheel (16), a separate maintenance unit (12) with the tools and the container and a clutch ( 13 | 16O) for coupling the units to one another for movement relative to one another and for moving the care unit with the movement of the drive unit. 209812/1168 " ⁵ " 21 .. Machine according to claim 20, characterized in that the coupling has coupling means (88, 16O) for connecting the units to one another for movement relative to one another and a power lifting device (9) which is connected to the coupling means for lifting the care unit from one position , in which the tools attack the floor to be maintained. 22. Machine according to claim 20, characterized in that the coupling has a central lifting coupling (88,160 and means connected to the lifting coupling to allow a rotation of the lifting coupling by a limited amount to enable lifting of the care unit on one side to a greater height than on the other side. 2Y. Machine according to Claim 20, characterized in that the coupling has a central lever coupling device (88, 160) which movably connects the care unit to the drive unit for exerting a lifting force on the care unit, furthermore a working cylinder (95) for exerting a lifting force on the coupling equipment Machine according to claim 23, characterized in that the cylinder is actuated by pressure medium, that the drive means have a pressure medium source (51, 33) and that a hydraulic circuit for establishing a fluid connection between the pressure medium source and the working cylinder and other hydraulically actuated puncture parts of the machine with a Uebenstromkreisabsohnitt (102) is provided for controlling the pressure medium loading of the cylinder and with a flow divider (105) for supplying a Torrang flow of pressure medium to the lifting electricity circuit section. 25. Machine according to claim 23, characterized in that control means (1021 155) are provided for regulating the lifting force exerted by the power lifting device on the coupling device - 6 209812/1168 2U5633 26 '. Machine according to one of Claims 20, 21 and 23, characterized in that the coupling has means (162, 163) for enabling limited lateral movement of the drive unit in relation to the care unit. 27. Machine according to claim 26, characterized in that force control means (166) are provided for determining the transverse position of the care unit opposite the drive unit. 28. Machine according to claim 27, characterized in that a steering control (27) for the bath to be steered and means (156, 157) responsive to the steering control for actuating the force control means (166) for moving the care unit in the transverse direction of the drive unit are provided opposite. 29. Machine according to claim 27 or 28, characterized in that means (158,159) are provided which respond to the ability of a side edge of the care unit on your vertical surface in such a way that the force control means for moving the care unit are confirmed opposite the drive unit. 30 * Machine according to one of claims 1 to 17 and 20 to 23 » characterized in that suction means (75» 76 {78} 231,227) are provided for removing liquid from the container. 31 · Machine according to spoke 30, characterized in that the drive means have a first hydraulic motor unit (75A) * a second hydraulic motor unit (51 »52) for driving the tools, a pressure medium source and control means (113) for controlling the function of the oil hydraulic motor units and that the suction means comprise a suction source (75) driven by the first hydraulic moijor unit (75A). 32 · machine according to claim 3I “ dad ^ TCh characterized ” deJS the control means (113) means for enabling a running of the two ^209812/1168 "Ud OR ₁ G ₁ NAL 2H5633 the hydraulic motor units at the same time in series and for optional Allowing only the first motor unit to run exhibit, 33 · Machine according to one of Claims 1 to 19, characterized in that driven wheels (I5) and at least one steerable wheel (16) are provided on the frame and that a drying device (195 »196, 198) for guiding a gaseous medium onto the Ground is present directly in front of at least a part of the driven and steerable wheels for drying the surface over which the respective wheel leads, or for removing the liquid from the path of movement of the respective wheel. 34 · Machine according to claim 33, characterized in that the drying device has a nozzle (198A) which is mounted for movement with the steerable wheel and for guiding the gaseous medium in front of the steerable wheel, furthermore a flexible tubular section which the nozzle with the line arrangement connects. 35 · Machine according to one of Claims 1 to 5 »18 and 19», characterized in that it has a drive unit (11) with driven and steerable wheels (15 »16)» a separate scrubbing unit (12) old means (37) for feeding Scrubbing fluid behind the wheels in the normal direction of travel of the machine, the tools and container forming part thereof, and means (I3) connecting the units for movement relative to one another, the scrubbing unit running behind the drive unit. 36. Machine according to claim 35, characterized in that squeezing means (70, 80, 81 | 232) are provided on the scrubbing unit on both sides of the tools and behind the tools. BATH ORIGINAL 209812/1168